website error notice ( undefined offset )

Hello,

Thank you for contacting Rank Math and bringing your concern to our attention. I’m sorry for any inconvenience this issue may have caused you.

It seems that you have already marked this ticket as already resolved. Could you please confirm if you still need our assistance with this issue?

If so, are you using any Rank Math filter for your website? If you can also share the link where we can see the error, that would be helpful.

Thank you, and looking forward to your update.

Hello,

Thank you for the update, and apologies for the delay.

This error happens when a featured thumbnail doesn’t exist on your posts/pages.

However, we released a quick Beta update you can try to see if that helps.

If you activate Rank Math, please enable the Beta update by following this:
https://rankmath.com/kb/version-control/#beta-updates

If you are unable to see an update, please clear Rank Math’s transients from:
WP Dashboard > Rank Math > Status & Tools > Database Tools > Remove Rank Math Transients > Remove transients

Screenshot for reference: https://i.rankmath.com/Pbu5J6

Please also note that some options are only available when you enable the Advanced Mode in Rank Math. If it’s not showing, you must have chosen to use the Easy Mode. Please follow the steps in this link to switch to Advanced Mode:
https://rankmath.com/kb/advanced-mode/

Please clear the caches, server, and WordPress after updating.

You can disable the Beta updates once you update to the latest version and if the issue is fixed.

I hope that helps. Thank you, and please don’t hesitate to contact us anytime if you need further assistance with anything else.